Smoke detector with built-in 10-year 3-volt lithium power cell Ionization sensor for efficient smoke detection Tamperproof design prevents batteries from being removed

【Simplified PoE】- Simplified Power over Ethernet means the IP cameras connect to the NVR with a single cable that transmits both data and power, allowing for an easy installation and setup. Repeater fits your flexible installation need. 8 Channel NVR gives you choices to add up to 4 more wired or wireless Zmodo Cameras 【1080p Full HD Video】- View Crystal 1080p Video and playback locally or remotely. See in the dark with automatic infrared night vision that illuminates up to 65ft. IP65 weatherproof rating means that you can install cameras anywhere 【Maximize your Storage】- Intelligent recording on the NVR will optimize your storage space by compressing recorded footage when no motion is detected, and recording at the full 25fps when motion is detected. Record up to 60 days for 4 cameras